Aluminum alloy doors and windows are used more and more widely in our daily life. Many consumers will worry about its corrosion resistance when they buy aluminum alloy doors and windows. So how to test the corrosion resistance of aluminum alloy doors and windows? There are many kinds of test methods to evaluate the corrosion resistance of aluminum alloy door products. Among them, salt spray test and damp heat test are widely used. Of course, the price of aluminum alloy door with strong corrosion resistance is higher.
Effect drawing of aluminum alloy doors and windows
1. Salt spray test of aluminum alloy door
Among them, acetic acid salt spray test and accelerated salt spray test are commonly used. The salt spray test is carried out in a special salt spray box. The test solution is atomized by compressed air, and then dropped on the surface of the sample. After the specified test time, the sample is taken out of the salt spray box for evaluation. The test equipment used in the three salt spray tests is the same, the main difference is that the test temperature and test solubility are different. The test solution of neutral salt spray test is 35 degrees plus or minus 2 degrees, and the test temperature of copper accelerated acetic acid salt spray test is 50 degrees plus or minus 2 degrees. Among the three salt spray tests, copper accelerated acetic acid salt spray test accelerated corrosivity was the fastest, followed by acetic acid salt spray test.
2. Damp heat test of aluminum alloy door
The hygrothermal test is to put the sample in an environmental chamber under the conditions of temperature and humidity, and check the change of products after the specified test cycle. GB / t1740-1979 stipulates that the test shall be suspended vertically in a temperature and humidity regulating box with a temperature of 47 degrees plus or minus 1 degree and a relative humidity of 96 plus or minus 2%. After a specified period of time, the appearance damage degree of the style shall be inspected and graded. The test results are generally divided into three levels, and the first level is the best. The surface of the pattern is only slightly discolored, and the coating has no blistering, rust and falling off. The third grade is the worst, and the surface of the pattern is seriously damaged.
The above method of testing aluminum alloy doors and windows with professional methods is not sure. Therefore, this test can only be done by professional manufacturers. When purchasing aluminum alloy doors, choosing professional manufacturers and checking relevant qualification certificates is to select the best aluminum alloy door.